Taylor has a steady stream of girlfriends like Emma Stone, Jessica Szohr, and Hailee Steinfeld, but we still hope that she and Selena will patch things up. For now, click through to see 17 celebrities that have had beef with their besties.

Selena and Justin's on-again, off-again relationship seemed to be visibly bothering Taylor at this year's Billboard Music Awards, when she was caught making an "ew" face at the couple as they embraced backstage. A rep for the songstress recently said that she and Selena are "great friends who talk almost daily," so we'll have to see if the girls are able to work through this rough patch.

Rihanna and Katy Perry had a reported rift earlier this year when Rihanna rekindled her romance with Chris Brown — haven't we all disliked a friend's significant other at one time or another?

Katy gushed about her gal pal in a recent Elle interview, saying, "I love her, and every time I see her, I'm reminded of the light that she has." She went on to say: "I know a lot of people out there with the most detrimental entourages — they are the root of their demise. It's really unfortunate but you can't save these people. My days of celebrity saving are over."

These Disney princesses have a pretty long history of breakups and makeups — to be honest, we don't even know where to start. Let's see: Demi Lovato and Selena Gomez first met on the set of Barney & Friends when they were little girls. The two grew up to both star on Disney channel shows and become huge performers, but it seems as though the girls grew apart somewhere along the way. Demi spoke out about their rift in 2010, saying: "We’re both busy, and I wish the best for her. True friends don't let their friends or family be mean to you. If you can’t trust somebody, you can’t be friends with them." Ouch.

Selena responded later that year, explaining that she and Demi "had our distance, and we've had our moments, but she's one person that I will always love, and she'll always have a place in my heart." And mostly recently, in May 2013, Demi hinted at a reconciliation between the two on MTV News: "Now we are in a place where I think we realized that life is so short and that when you have people in your life that love you so much then, you should just always be around them."

Demi and Miley met on the set of Hannah Montana in 2007 and became fast friends. Two years later, they had a very public spat, taking to Twitter to air each other's dirty laundry. Miley shared a photo of the two with the caption, "Now this is what true friendship looks like. None of that hollywood c***. @ddlovato I miss you." To which Demi shot back, "Yeah... It's just kind of hard to miss somebody that I don't know anymore."

Demi's semisnide comment could have been due to the fact that Miley had recently filmed a YouTube video where she mocked Demi and Selena Gomez (Miley later took the clip down and said that she was "super sorry" in an interview). Demi addressed the fight in an interview with Seventeen magazine in 2012, saying, "[Miley] and I are strong headed. When we fight it’s brutal, and we’re like, ‘We’re never going to be friends again!’ Then two days later, were like, ‘I love you and I miss you!'"

It seems that despite their tumultuous past, Demi and Miley are on good terms. Most recently, Demi, who has had her own personal ups and downs with drugs and alcohol, spoke out about her pal's new party lifestyle in an MTV interview, saying: "She knows how I feel about the whole partying thing. I love her to death, and I’m always like, ‘Just be careful.' I care for her so much that I’m so protective. But she’s good. She’s got a good head on her shoulders."

In one of the most publicized (and confusing) celebrity friendships feuds, Paris Hilton and childhood BFF Nicole Richie fell out in a big way in 2005. Neither of the girls has confirmed what actually happened to cause the rift, though Paris did famously tell reporters: "I will not go into the details of what happened. All I will say is that Nicole knows what she did, and that's all I am ever going to say about it."

It was reported that Nicole showed Paris's sex tape to a group of friends at a house party that year, but it remains just a rumor — and let's not forget that painfully awkward fourth season of The Simple Life, where Paris and Nicole were filmed separately. Nicole did tell Vanity Fair in 2006 that after she got out of rehab, she "just decided I didn't want to be her friend anymore. We're just two completely different people; we don't have that much in common."

Lauren Conrad and Heidi Montag were a blonde, bubbly match made in heaven when they starred on The Hills together in 2006, but things quickly went sour once Heidi fell in love with Spencer Pratt. Lauren repeatedly tried to warn her friend about the bad boy, calling him "shady," but Heidi couldn't be bothered — she eventually chose her boyfriend over her BFF, and the friendship fell apart.

Cut to 2007, and Lauren runs into Heidi and Spencer at an LA party and confronts her former friend on air, saying, "You're a bad person." While LC reluctantly attended Spencer and Heidi's (televised) wedding two years later, she has revealed that the two "don't talk" anymore.

Gwyneth Paltrow and Winona Ryder were nearly inseparable in the '90s — they were dating BFFs Ben Affleck and Matt Damon, respectively — but cut ties in 1998 when Gwyneth reportedly stumbled upon the script for Shakespeare in Love lying around Winona's home. Gwyneth is said to have asked to audition for the role, and as we all know, she landed it, and went on to win an Oscar.

Things came to a head again in 2009 after Gwyneth launched her now-famous website, Goop. In an early article, she addresses a former friend that many speculate to be Winona, saying, "Back in the day, I had a 'frenemy' who, as it turned out, was pretty hellbent on taking me down." She went on to write: "I restrained myself from fighting back. I tried to take the high road. But one day I heard that something unfortunate and humiliating had happened to this person. And my reaction was deep relief and happiness."

Katy Perry and Kristen Stewart's friendship fallout seemed to be centered on one thing: Robert Pattinson. Kristen and Robert broke up in May 2013, and Katy, who is friends with both Twilight stars, was reportedly forced to choose sides. While Katy and Rob continued to hang out after his breakup with Kristen, rumors spread that the two were more than friends. In an effort to clear the air and save both of her relationships, Katy took things into her own hands. She revealed in the September 2013 issue of Elle UK, "I sent her [Stewart] a text message saying: 'I know you've seen all this stuff, but you know I would never disrespect you. I'm not that person. I'm just trying to be a friend to him, but it is unfortunate that I do have a set of tits.'"

While it hasn't been confirmed whether or not Katy and Kristen have officially patched things up, you have to admire Katy's can-do attitude when it comes to setting the record straight.

Before the world was keeping up with Kim Kardashian and her family on TV, she was the close party pal of Paris Hilton. The two regularly hit the red carpet together and ran in the Hollywood socialite circle that included Nicole Richie and Lindsay Lohan. Reportedly, Kim and Paris's friendship ended in 2007 after Kim became the new celebrity on the block. Things got even more heated in April 2007 when Paris told a Las Vegas radio host, "I would not want [Kim's butt] — it’s gross! It reminds me of cottage cheese inside a big trash bag." Burn.

A source told Us Weekly later that year that Paris's beef with Kim "is 100 percent jealousy," adding, "Kim is not only doing what Paris did, she's doing it better."

Jessica Simpson and her longtime friend and hairstylist Ken Paves reportedly fell out once Jessica met her fiancé, Eric Johnson, in May 2010. A source told Us Weekly that Ken was "sick of her cycle of dumping friends when she's with a guy," adding: "She doesn't care about the world, only herself. All she talks about is men, love and sex."

Though Gwyneth Paltrow and Madonna have been friends since the late '90s, both stars have reportedly gone their separate ways. A source close to the women claimed that they had "a major falling out" in 2010. The insider told Us Weekly that, "They don't speak," adding, "I can't tell you exactly why they had the falling out, but Gwyneth can be jealous and competitive."

Without naming any names, Gwyneth told Vogue UK in May of that year: "I'm having a situation right now with a friend where I'm feeling pretty angry."